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6. INVENTORIES
9 Months Ended
Feb. 28, 2015
Inventory Disclosure [Abstract]  
6. INVENTORIES

6.  INVENTORIES

 

    Inventories are comprised of the following (in thousands):

 

    February 28,     May 31,  
    2015     2014  
Raw materials and sub-assemblies   $ 3,627     $ 3,348  
Work in process     3,099       2,585  
Finished goods     128       215  
    $ 6,854     $ 6,148